The biofuels commercially available to refiners have long
been limited to ethanol and biodiesel. These fuels
offer the benefits of being readily produced from a variety of
commercial feedstocks by well-established technologies. Given
growing demand for biofuels, driven by government policy and economics, considerable
attention is being paid to commercialize technologies that
expand the range of applicable feedstocks to include
lignocellulosic materials. This is being done to increase the
potential supply and, ultimately, to lower costs.

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